Improvement in bracket-sheaves



CHARLES H. STRAFFIN.-

'Imp'rrovemen'f Brr'acknet Sheave.

Patented April 9I 1872.

INvENTon 'UNITED STATES PATENT OFFICE.

CHA RL S H. STRAFFIN, OF BOSTON, ASSIGNOR TO HIMSELF AND JAMES H. PARKER, OF NATICK, MASSACHUSETTS.

IMPROVEMENT IN BRACKET-SHEAVES.

Specification forming part of Letters Patent No. 125,419, dated April 9, 1872.

To all whom t may concern:

l I, CHARLES H. STRAFFIN, of Boston, in the county of Suffolk and State of Massachusetts, have invented a certain new and useful Bracket-Sheave, of which the'following is a specification:

The N atnre of the Invention.

The nature of my invention consists in combining, `with an open sheave-block, a plate at right angles to the plane of the pulley, said plate being provided with screw or nail-holes by means of which the sheave may be fastened to the post or support; the whole being an article of manufacture.

n Description of the Accompany/ing Drawing.

Figure l is a perspective view of my invention. Fig. 2 is a vertical section of the saine. General Description. Let A represent the pulley held by the open block B, the block B being open at D so that the line may be easily put in position. E is a plate cast at right angles to the block B, and is provided with screw or nai1-holes H H H, by which the sheave is to be made fast to the support.

I am aware that open sheaves have been made before; and I therefore conine myself to the cast metallic bracket-slleave as an article of manufacture.

I claim as my invention- The cast metallic sheave as an article ofl manufacture, consisting of the parts A B E, substantially as described, and for the purpose set forth.

CHARLES H. STRAFFIN. l

Witnesses:

J. L. NEWTON, F. G. PARKE. 

